Youtor
Photochemical Smog Animation
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=CWsGwtiiSio
#PhotochemicalSmog #AnimatedChemistry #KineticSchool • More videos: • What is Greenhouse Effect? Explained. • • Greenhouse Gases and Greenhouse Effec... • Layers of the Atmosphere • • Layers of the Atmosphere (Animation) • How Lightning Forms • • How Lightning Forms (Animation) • How Satellite Works • • How Satellite Works (Animation) • Acid Rain • • Acid Rain (Animation) • Sources of Air Pollution • • Sources of Air Pollution (Animation) • Air Pollution • • Air Pollution (Animation) • How Battery Works • • How Battery Works (Animation) • Corrosion : Factors Affecting Corrosion (Chapter 1) • • Corrosion : Factors Affecting Corrosi... • Corrosion : Dry or Chemical Corrosion (Chapter 2) • • Corrosion : Dry or Chemical Corrosion... • Corrosion : Electrochemical Cell or Corrosion Cell (Chapter 3) • • Corrosion : Electrochemical Cell or C... • Corrosion : Types of Electrochemical Cells (Chapter 4) • • Corrosion : Types of Electrochemical... • Corrosion : Rusting of Iron (Chapter 5) • • Corrosion : Rusting of Iron (Chapter ... • Formation of Photochemical smog: • Smog is a mixture of fog and smog which occurs in some busy industrial cities. • Smoke + Fog = SMOG • Smog is of two types: • 1. Classical Smog. • 2. Photochemical Smog. • Classical Smog, is produced by the combustion or burning of fossil fuels like coal, petrol or gasoline etc., and caused by a mixture of smoke and SO2, present in air. • Classical smog also known as London Smog. • • It’s also reducing in nature. • • It occurs in cool, humid climate. • • Major Constituents are smoke, fog and sulfur dioxide. • • It can occur both during the day and at night. • In December 1952, London was trapped in a deadly cloud of fog and pollution for five days. • At the time, the city ran on cheap coal for everything from generating power to heating homes. • which was the result of classical smog. • Photochemical smog is a type of smog produced when ultraviolet light from the sun reacts with nitrogen oxides (NOx) and volatile organic compounds (VOCs) in the atmosphere. • • It is also referred to as Summer Smog or Los Angeles Smog . • • It is an Oxidising Smog and visible as a Brown Haze. • • It only happens in the presence of sunlight. • • Major Constituents are Hydrocarbons, O3, PAN and NOx. • • It is most prominent during the morning and afternoon. • photochemical smog formation is influenced by the weather conditions, such as • • Warm Sunny Days. • • Gentle Winds. • • Lower Level Inversion, which is also known as Thermal Inversion. • • Combustion of hydrocarbon and Nitrogen Oxides. • Sources of Photochemical smog’s pollutants. • •Volcanic eruption • • Forest fire • • Automobiles • • industry • • power plant • Reaction of Photochemical smog: • •Nitrogen (N₂) and Oxygen (O₂) combine in the combustion process to form Nitric Oxide (NO). • N₂ + O₂ = 2NO • •This Nitric Oxide (NO) oxidized in the atmosphere to produce Nitrogen Dioxide (NO₂). • 2NO + O₂ = 2NO₂ • •Sunlight breaks down Nitrogen Dioxide (NO₂) into Nitric Oxide (NO) and an Oxygen radical (O). • NO₂ + h𝝊 = NO + O • •The Oxygen radical (O) combines with molecular Oxygen (O₂) to form Ozone (O₃). • O₂ + O = O • •Ozone (O₃) is the main component of photochemical smog. • •NO can remove O₃ by reacting with it to form NO₂ and O₂ . • NO + O₃ = NO₂ + O₂ • • Alternative Reactions: • NO and NO₂ can also react with the hydrocarbons instead of O₃ to form other volatile compounds known as PAN (peroxyacetyl nitrate). • NO₂ + O₂ + Hydrocarbons + light → PAN • a) Reactive hydrocarbon (those with C=C group) from auto exhaust interact with O₃ to from a hydrocarbon free radical RCH₂•. • b) RCH₂• rapidly reacts with O₂ to from another free radical RCH₂O₂•. • c) RCH₂O₂• reacts with NO to produce NO₂ the free radical RCH₂O • d) This new free radical next interacts with O₂ to yield a stable aldehyde (RCHO), and hydroperoxyl radical (HO₂•). • e) HO₂• then reactive with another molecule of NO to give NO₂ HO•. • f) HO• is extremely reactive rapidly reacts with a stable hydrocarbon RCH ₃ to yield H₂O regenerate the hydrocarbon free radical RCH₂•, thereby completing cycle. • Peroxyacetyl nitrate is also known as peroxyacyl nitrate. • Photochemical smog was first identified in Los Angeles in 1944. • In 2017, Photochemical smog to envelop large parts of Beijing. • Otherwise, In November 2017, the air pollution spiked far beyond acceptable levels in Delhi. • Effects of Photochemical smog: • Photochemical smog's effects cause eye irritation, damage to the respiratory system and vegetation. • • Visit us on Facebook: / kinetic-school-538859946461104 • Subscribe to Kinetic School: / @kineticschool • • • Music: • Lights by Sappheiros / sappheirosmusic • Creative Commons — Attribution 3.0 Unported — CC BY 3.0 • http://creativecommons.org/licenses/b... • Music promoted by Audio Library • Lights – Sappheiros (No Copyright Music)
#############################
